If you wanted it to also work with the Advanced Morphine Injector Buff, add in there:
<Also works on Advanced Morphine Injector>

Morphine Injector Buff Description:
Heals 3 HP every 5 seconds while not being incapacitated or hanging from a ledge. The morphine injector cannot heal you if you are poisoned.
<Incompatible with Advanced Morphine Injector Buff>

Advanced Morphine Injector Buff Description:
Heals 1% of your missing health every 5 seconds while not being incapacitated or hanging from a ledge. The morphine injector cannot heal you if you are poisoned.
<Incompatible with Morphine Injector Buff>
<Coop Only>

The reason why I suggested this idea is because several buff enhancements such as Furious Ignition and Shared Excitement have both the normal and enhanced versions of buffs work with them. I figured why not add the enhanced version of Morphine Injector: Advanced Morphine Injector to the list of buffs that work with the Boosted Morphine Buff Enhancement.

Feel free to put your suggestions for this idea down below and vote in the POLL above if you want to